IP Library › Granted Patent US 12,367,177
Granted Patent B2
US 12,367,177 · App. 18/655,558 · Granted Jul 22, 2025

Migrating data between data storage systems integrated with application orchestrators

Inventors: Srividhya Kavaipatti Anantharamakrishnan (Santa Clara, CA); Lasaro Camargos (Uberlandia, BR); Abhijith Shenoy (Sunnyvale, CA); Xiangyu Wang (Fremont, CA); Avinash Lakshman (Fremont, CA); Srinivas Lakshman (San Jose, CA)
Assignee: Commvault Systems, Inc.
G06F16/119G06F16/125G06F16/128G06F16/182
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Quick Facts
Patent No.
US 12,367,177
App. No.
18/655,558
Filed
May 6, 2024
Granted
Jul 22, 2025
Kind
B2
Art Unit
2166
USPC
707/827
Abstract

A distributed data storage system comprises features for integration with application orchestrators such as Kubernetes, and includes a proprietary Container Storage Interface (CSI) driver. Features include setting snapshot scheduling and retention policies, and a “container data mover” that replicates data from a source to a distinct destination distributed data storage system. The migration may be configured one-to-one, one-to-many, unidirectional, and/or bi-directional. Metadata-based snapshots and metadata-based changed block tracking identify payload data to move from source to destination within application orchestrator frameworks at both ends. Payload data is migrated from source to destination using different techniques than those used for migrating metadata, e.g., kernel-to-kernel for copying payload data versus ordinary metadata writes. An illustrative barrier logic ensures that the migration follows a controlled progression of operations.

Claims (48)

1. A first distributed data storage system comprising:

a first storage node that comprises metadata associated with a first virtual disk of the first distributed data storage system,

wherein the first virtual disk is configured as a persistent volume in an application orchestrator environment; and

a second storage node that comprises payload data of the first virtual disk,

wherein the payload data was generated by a containerized application of the application orchestrator environment;

wherein the first storage node is configured to:

generate a first snapshot based on the metadata associated with the first virtual disk, wherein generating the first snapshot causes a generation counter to be increased from a first value to a second value;

identify, at the second storage node, a first set of payload data files that are associated with the first value of the generation counter;

cause the second storage node to transmit the first set of payload data files, using kernel-to-kernel communications, to a corresponding storage node at a second distributed data storage system, which is distinct from the first distributed data storage system, and wherein the second distributed data storage system comprises a second virtual disk that corresponds to the first virtual disk;

after the first set of payload data files have been successfully stored at the second virtual disk of the second distributed data storage system, receive permission to transmit metadata captured in the first snapshot to a storage node at the second distributed data storage system; and

wherein each storage node of the first distributed data storage system comprises one or more hardware processors and data storage resources; and further wherein each storage node of the second distributed data storage system comprises one or more hardware processors and data storage resources.

2. The first distributed data storage system of claim 1 , wherein a barrier logic, which executes at one or more storage nodes of the first distributed data storage system, is configured to: issue the permission, and control a migration of payload data and associated metadata from the first distributed data storage system to the second distributed data storage system.

3. The first distributed data storage system of claim 1 , wherein a barrier logic, which executes at one or more storage nodes of the first distributed data storage system, is configured to: issue the permission, based on determining that the first set of payload data files have been successfully stored at the second virtual disk of the second distributed data storage system.

4. The first distributed data storage system of claim 3 , wherein the barrier logic controls a migration from the first distributed data storage system to the second distributed data storage system according to a controlled progression of operations, and wherein, according to the controlled progression of operations, first metadata is transmitted to the second distributed data storage system after corresponding payload data files that correspond to the first metadata are successfully stored at the second distributed data storage system; and

wherein the barrier logic is further configured to abort the migration to the second distributed data storage system, based on determining that the corresponding payload data files are not successfully stored at the second distributed data storage system.

5. The first distributed data storage system of claim 1 , wherein the first set of payload data files at the second storage node also includes third payload data files associated with a third value of the generation counter that preceded the first value, and wherein a migration of the third payload data files to the second distributed data storage system previously failed.

6. The first distributed data storage system of claim 1 wherein within the application orchestrator environment:

a custom resource definition defines a schedule-and-retention policy applicable to the first snapshot,

a storage class is configured with migration enabled and makes reference to the schedule-and-retention policy, and

a persistent volume claim makes reference to the storage class.

7. The first distributed data storage system of claim 1 configured to implement a container storage interface (CSI) within the application orchestrator environment, wherein the first distributed data storage system is further configured to use the CSI for one or more of: (a) provisioning a persistent volume claim that references the first virtual disk of the first distributed data storage system, (b) creating a custom resource definition within the application orchestrator environment that defines a schedule-and-retention policy applicable to the first snapshot, and (c) enabling payload data migration from the first virtual disk to the second virtual disk.

8. The first distributed data storage system of claim 1 , wherein the application orchestrator environment is based on Kubernetes technology.

9. The first distributed data storage system of claim 1 , wherein at least one of the first distributed data storage system and the second distributed data storage system operates in a cloud computing environment.

10. The first distributed data storage system of claim 1 , wherein the containerized application is cloud-native to a cloud computing environment that hosts the application orchestrator environment.

11. The first distributed data storage system of claim 1 , wherein the first storage node is further configured to: based on expiration of the first snapshot, determine whether the first virtual disk is migration-enabled; and, based on determining that the first virtual disk is migration-enabled, initiate a migration of the first set of payload data files to the second distributed data storage system.

12. A first distributed data storage system comprising:

a first storage node that comprises metadata associated with a first virtual disk of the first distributed data storage system,

wherein the first virtual disk is configured as a persistent volume in an application orchestrator environment; and

a second storage node executing a data storage subsystem that comprises payload data of the first virtual disk,

wherein the payload data was generated by a containerized application of the application orchestrator environment;

wherein the first storage node is configured to coordinate a migration of the payload data of the first virtual disk and of the metadata associated with the first virtual disk, from the first distributed data storage system to a second distributed data storage system, wherein to coordinate the migration the first storage node is configured to:

generate a first snapshot based on the metadata associated with the first virtual disk, wherein generating the first snapshot causes a generation counter to be increased from a first value to a second value;

identify, at the second storage node, a first set of payload data files that are associated with the first value of the generation counter;

cause the second storage node to transmit the first set of payload data files, using kernel-to-kernel communications, to a corresponding storage node at a second distributed data storage system, which is distinct from the first distributed data storage system, and wherein the second distributed data storage system comprises a second virtual disk that corresponds to the first virtual disk;

after the first set of payload data files have been successfully stored at the second virtual disk of the second distributed data storage system, and based on a permission received from a barrier logic that executes on one or more storage nodes of the first distributed data storage system, transmit metadata captured in the first snapshot to a storage node at the second distributed data storage system; and

wherein each storage node of the first distributed data storage system comprises one or more hardware processors and data storage resources; and further wherein each storage node of the second distributed data storage system comprises one or more hardware processors and data storage resources.

13. The first distributed data storage system of claim 12 , wherein the barrier logic is configured to control the migration from the first distributed data storage system to the second distributed data storage system according to a progression of operations, and wherein, according to the progression of operations, first metadata is transmitted to the second distributed data storage system after corresponding payload data files that correspond to the first metadata are successfully stored at the second distributed data storage system; and

wherein the barrier logic is further configured to abort the migration to the second distributed data storage system, based on determining that the corresponding payload data files are not successfully stored at the second distributed data storage system.

14. The first distributed data storage system of claim 12 , wherein the first set of payload data files at the second storage node also includes third payload data files associated with a third value of the generation counter that preceded the first value, and wherein a migration of the third payload data files to the second distributed data storage system previously failed.

15. The first distributed data storage system of claim 12 wherein within the application orchestrator environment:

a custom resource definition defines a schedule-and-retention policy applicable to the first snapshot,

a storage class is configured with migration enabled and makes reference to the schedule-and-retention policy, and

a persistent volume claim makes reference to the storage class.

16. The first distributed data storage system of claim 12 configured to implement a container storage interface (CSI) within the application orchestrator environment, wherein the first distributed data storage system is further configured to use the CSI for one or more of: (a) provisioning a persistent volume claim that references the first virtual disk of the first distributed data storage system, (b) creating a custom resource definition within the application orchestrator environment that defines a schedule-and-retention policy applicable to the first snapshot, and (c) enabling payload data migration from the first virtual disk to the second virtual disk.

17. The first distributed data storage system of claim 12 , wherein the application orchestrator environment is based on Kubernetes technology.

18. The first distributed data storage system of claim 12 , wherein at least one of the first distributed data storage system and the second distributed data storage system operates in a cloud computing environment.

19. The first distributed data storage system of claim 12 , wherein the containerized application is cloud-native to a cloud computing environment that hosts the application orchestrator environment.

20. The first distributed data storage system of claim 12 , wherein the first storage node is further configured to: based on expiration of the first snapshot, determine whether the first virtual disk is migration-enabled; and, based on determining that the first virtual disk is migration-enabled, initiate the migration of the first set of payload data files to the second distributed data storage system.

Assignments (2)
SUPPLEMENTAL CONFIRMATORY GRANT OF SECURITY INTEREST IN UNITED STATES PATENTS Recorded Apr 16, 2025
From: COMMVAULT SYSTEMS, INC.
To: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 070864/0344 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 5, 2024
From: KAVAIPATTI ANANTHARAMAKRISHNAN, SRIVIDHYA; CAMARGOS, LASARO; SHENOY, ABHIJITH; WANG, XIANGYU; LAKSHMAN, AVINASH; LAKSHMAN, SRINIVAS
To: COMMVAULT SYSTEMS, INC.
Reel/Frame 067620/0364 →
Continuity (4)
Continuation 17702644 · Mar 23, 2022
Continuation 17179160 · Feb 18, 2021
Provisional Application 63082631 · Sep 24, 2020
Related Publication 20240289300A1 · Aug 29, 2024
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